From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Graf Subject: Re: [GIT net-next] Open vSwitch Date: Tue, 14 Jan 2014 10:46:15 +0100 Message-ID: <52D50767.6050906@redhat.com> References: <1389053776-62865-1-git-send-email-jesse@nicira.com> <52CD657F.7080806@citrix.com> <52D42A9E.1030805@citrix.com> <52D4857C.7020902@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Cc: "dev-yBygre7rU0TnMu66kgdUjQ@public.gmane.org" , netdev , David Miller To: Jesse Gross , Zoltan Kiss Return-path: In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dev-bounces-yBygre7rU0TnMu66kgdUjQ@public.gmane.org Errors-To: dev-bounces-yBygre7rU0TnMu66kgdUjQ@public.gmane.org List-Id: netdev.vger.kernel.org On 01/14/2014 02:30 AM, Jesse Gross wrote: >> And it works. I guess the last one causing the problem. Might be an >> important factor, I'm using 32 bit Dom0. > > I think you're probably right. Thomas - can you take a look? > > We shouldn't be doing any zerocopy in this situation but it looks to > me like we don't do any padding at all, even in situations where we > are copying the data. I'm looking into this now. The zerocopy method should only be attempted if user space has announced the ability to received unaligned messages. @Zoltan: I assume you are using an unmodified OVS 1.9.3?